CN101007431A - Processing technology of silicon rubber mould - Google Patents

Abstract

The invention provides a silicone rubber mold manufacturing process, the process is: 1. labeling a layer clay or plasticine on one side surface of exemplar prototype mouldjoint and producing a template frame of semi-mold; 2. casting the gypsum slurry into template frame; 3. removing the clay or plasticine layer from exemplar prototype mouldjoint after the gypsum slurry congealing, and cleaning the cavity; 4. deploying the silicone rubber uniformly and debubbling at vacuum, pouring it in the cavity of gypsum and exemplar prototype surface, and sulfidizating the silicone rubber materials; 5. Removing the exemplar prototype and cleaning the cavity; 6. producing another semi-mold through the above steps. The process of the invention only cast one layer of silicone rubber material on the mold cavity surface, reduces silicone rubber material consumption, reduces the mold production costs, while the product is easy to be taken out from the thin-walled silicone rubber mold, it overcomes the product quality problem caused by the poured product by traditional silicon rubber mold is different be taken out in the demolding process, it improves the life of silicone rubber mold.

Description

A kind of processing technology of silicon rubber mould

Technical field

The present invention relates to be used for the processing technology of silicon rubber mould that new product is developed fast and the exemplar small lot is made.

Background technology

Processing technology of silicon rubber mould is a kind of rapid tooling manufacturing method of relatively popularizing.Because silicon rubber mould has good flexibility and elasticity, the part that can make complex structure, meticulous, the no pattern draft of decorative pattern even fall pattern draft and have dark groove class, fabrication cycle is short, the parts quality height, thereby in the single-piece of new product development or small lot exemplar quick Fabrication, receive much concern.

Present product quick manufacturing process based on rapid prototyping and silicon rubber fast mould technology, be to adopt fabrication techniques product prototypes such as SLA, FDM, LOM or SLS, after translating into silicon rubber mould again, the liquid resin of the two components of perfusion promptly obtains required part after the curing in mould.Select the two components resin and the composition thereof of different component and performance, can make the mechanical performance of resin part approach the working of plastics of ABS or PP material.

At present, the technological process of making based on the silicon rubber mould of rapid prototyping technology both at home and abroad is: rapid prototyping master mold processing-die joint making-framed building-silicon rubber metering, mixing and vacuum defoamation-silicon rubber cast and curing-taking-up workpiece prototype and die cavity are handled.In the silicon rubber mould practical application, the manufacturing of silicon rubber mould all exists bigger waste of material, as shown in Figure 1, during silicon rubber mould is made, for ease of matched moulds and technological operation, framed 3 generally all build according to the square of rule, and owing to need the difference of the exemplar external structure shape of making, satisfying under the necessary mold cavity wall thickness condition between the outer contour shape of exemplar prototype 1 and framed 3, the subregion exists bigger space.This part does not play a major role with 4 pairs of mould moldings of silicon rubber that exemplar prototype 1 does not directly contact, and for producer, because silicon rubber price height, the input cost height, must cause unnecessary waste, and product also is not easy to the demoulding, often need carries out operation of poor quality in the knockout course, influence the quality of product, cause reduce die life.Therefore, overcome the unnecessary waste of material in the silicon rubber mould making, economical processing technology of silicon rubber mould method is proposed, and provide wherein key technical problem, to guarantee the enforcement of this technology,, reduce the material resources waste for creating conservation-minded society, reduce the silicon rubber mould manufacturing cost, have important practical value.

Summary of the invention

The present invention is directed to deficiencies such as there being waste of material in the existing processing technology of silicon rubber mould technology, provide that a kind of molding cost is low, product is easy to the demoulding, die life high processing technology of silicon rubber mould.

The technical process of processing technology of silicon rubber mould of the present invention is:

(1) is placed on the flat board after the exemplar prototype is cleared up and fixes, paste one deck clay or plasticine, on flat board, press die joint and make the framed of a half module at a side surface of exemplar prototype die joint;

(2) calcium plaster for preparing is poured in make framed;

(3) treat that calcium plaster solidifies after, from exemplar prototype surface removal clay or rubber mud layer, and the cleaning die cavity;

(4) with the silicon rubber allotment evenly, be poured into after the vacuum defoamation in the cavity on gypsum and exemplar prototype surface, and make the silastic material sulfuration;

(5) take out the exemplar prototype, the cleaning die cavity;

(6) make another half module by above-mentioned steps.

Technology of the present invention is only at die surface cast one deck silicon rubber, reduced the consumption of silicon rubber, reduced the cost of manufacture of mould, when adopting the silicon rubber mould notes type product that the present invention makes simultaneously, product is very easy to be taken out from the silicon rubber mould of thin layer, the product that has overcome the cast of traditional silicon rubber mold is difficult to take out in going out mold process and carries out the parts quality problem that operation of poor quality causes, mould is not fragile, has improved the life-span of mould.

Description of drawings

Fig. 1 is the process schematic representation of existing silicon rubber mould.

Fig. 2 is the schematic diagram that pastes clay or rubber mud layer among the present invention at a side surface of exemplar prototype die joint.

Fig. 3 be among the present invention calcium plaster is poured into framed in, treat that calcium plaster solidifies the schematic diagram that clay or rubber mud layer are removed in the back.

Fig. 4 is the schematic diagram of silicon rubber cast among the present invention.

Fig. 5 is the schematic diagram after the taking-up exemplar prototype among the present invention.

Wherein: 1, exemplar prototype, 2, silicon rubber, 3, framed, 4, the traditional silicon rubber moulding makes the silica gel material of waste, 5, flat board, 6, clay or rubber mud layer, 7, gypsum.

The specific embodiment

Embodiment

Technological process of the present invention is: exemplar prototype (can by the rapid shaping technique manufacturing)-somatotype processing-stickup clay or plasticine-build is framed-join calcium plaster-gypsum molding-go clay-cast silicon rubber-silicon rubber vulcanization-taking-up exemplar prototype and handle die cavity.

Concrete technical process is as follows:

1. as shown in Figure 2, exemplar prototype 1 is carried out necessary removing surface and smooth treatment, and the exemplar prototype is fixed on dull and stereotyped 5, paste clay or plasticine 6 on exemplar prototype surface, clay or plasticine 6 also available heat soluble materials substitute, and the thickness of stickup is generally about 10mm.According to mold integral size and minimum wall thickness (MINI W.) requirement, on dull and stereotyped 5, make framed 3 of a half module.

2. as shown in Figure 3, land plaster and water are mixed according to certain ratio, make the pulpous state that is easy to flow, calcium plaster 7 is poured in framed 3.

3. after treating that calcium plaster solidifies, remove clay or rubber mud layer, and the cleaning die cavity.For ease of removing clay or rubber mud layer, the exemplar prototype that has clay or rubber mud layer together can be taken off with dull and stereotyped 5, again flat board and prototype are resetted after the cleaning.

4. as shown in Figure 4, according to the ratio allotment of silastic material host and curing agent regulation evenly, silastic material 2 is poured into exemplar prototype 1 after the vacuum defoamation and the gypsum 7 that solidifies between die cavity, make the silastic material full cure under the room temperature, or make the silastic material short vulcanization at a certain temperature.

5. as shown in Figure 5, take out the exemplar prototype, the cleaning die cavity.

6. make another half module by above-mentioned steps.

Claims (1)

1. processing technology of silicon rubber mould, it is characterized in that: the technical process of this technology is:

(1) is placed on the flat board after the exemplar prototype is cleared up and fixes, paste one deck clay or plasticine, on flat board, press die joint and make the framed of a half module at a side surface of exemplar prototype die joint;

(2) calcium plaster for preparing is poured in make framed;

(3) treat that calcium plaster solidifies after, from exemplar prototype surface removal clay or rubber mud layer, and the cleaning die cavity;

(4) with the silicon rubber allotment evenly, be cast in after the vacuum defoamation in the cavity on gypsum and exemplar prototype surface, and make the silastic material sulfuration;

(5) take out the exemplar prototype, the cleaning die cavity;

(6) make another half module by above-mentioned steps.

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